CN103199220B - Washing-free process of negative plate of lead-acid battery - Google Patents

Abstract

The invention provides a washing-free process of negative plates of lead-acid batteries, which relates to the technical field of storage batteries. The process comprises the following steps of: 1, soaking the formed negative plates into dilute sulfuric acid so as to store acid into micropores of the negative plates; 2, hanging the negative plates in the air so as to enable the acid to flow out from inside to generate isolating layers on effective area; 3, soaking the negative plates into an antioxidant solution at normal temperature; and 4, stringing the grooved negative plates by a stainless steel rod, separating the negative plates at intervals of 3mm to 6 mm, soaking the stringed negative plates into dilute sulfuric acid with the density of 1.05g/ml for 4 to 6 minutes, hanging and airing the negative plates taken out of the dilute sulfuric acid at room temperature for 4 to 6 minutes, soaking the aired negative plates into an antioxidant solution at normal temperature for 4 to 6 minutes, and drying the negative plates by exhausting air for 2 to 4 hours at 60 to 80 DEG C. By the process, water is saved, environmental pollution caused by waste water treatment and partial emission is avoided, the production efficiency is improved, and the comprehensive performance of the products is improved.

Description

Lead-acid battery cathode plate Non-water washing technique

Technical field

The present invention relates to battery technology field, be specifically related to a kind of lead-acid battery cathode plate Non-water washing technique.

Background technology

Storage battery is the one in battery, and its effect is limited power storage, uses in suitable place.Its operation principle is exactly be electric energy chemical energy.Along with the development of modern industry, need to use the product of storage battery to get more and more, make market also increasing to the demand of storage battery, the output of storage battery also increases day by day.Along with people are to the excellent properties of tubular cells, the particularly progressively understanding of long-life performance, the production scale of domestic tubular cells heats up gradually.The domestic treatment process to lead-acid battery negative pole plate is at present: negative plate changes into rear being immersed in rapidly in rinsing bowl, and rinse vitriolated pole plate to neutral with the clear water of flowing, the boric acid saturated solution or the density that are then immersed in 50-60 DEG C are 1.02g/cm³glycerin solution in keep 1-3 minute, carry out drying immediately after taking-up.In recent years, both at home and abroad many companies are at this washing process of research, but what stress to study is the temperature range of water in washing process, the time etc. of washing.

Traditional washing process will consume a large amount of clear water in process of production, the industrial wastewater of discharge leaded and sulfuric acid in a large number.When China's water resources critical shortage, a large amount of consumption of water constrain further developing of production, and leaded and industrial wastewater that is sulfuric acid also brings serious environmental pollution simultaneously.

As China Patent Publication No. CN1056189A, disclose a kind for the treatment of technology for negative plate of dryly charged lead-acidic accumulator, it directly enters certain hour in certain density xylitol or glycerin solution after proposing that negative plate is gone out groove, then takes out and carries out drying.Although it eliminates washing process, battery prepared by this mode is shorter.

Summary of the invention

Technical problem to be solved by this invention is to provide one to save water resources, does not have the lead-acid battery cathode plate Non-water washing technique of waste discharge.

Technical problem to be solved by this invention realizes by the following technical solutions:

A kind of lead-acid battery cathode plate Non-water washing technique, comprises following processing step,

1. first the negative plate changed into being immersed in density is 4-6 minute in the dilution heat of sulfuric acid of 1.05g/ml, and temperature controls at 10-45 DEG C, makes the dilute sulfuric acid storing relative density in the micropore of negative plate;

2. by negative plate soaked in step 1 hanging in atmosphere, hanging 4-6 minute under the room temperature of 10-45 DEG C, make the outflow of the sulfuric acid of negative plate inside on effective area and react with the lead sponge on negative plate surface area in atmosphere to generate separator, its reaction equation:

2Pd+O₂+2H₂SO₄→2PdSO₄+2H₂O；

3. the negative plate after having reacted in step 2 being immersed in density is at normal temperatures in the antioxidant solution of 1.035g/ml, soak time 4-6 minute;

4. put on stainless steel rod by the negative plate after grooving in step 3 and arrange, plate and distance between plates 3-6mm, then proceed to exhaust blower 2-4 hour, dry at the temperature of 60-79 DEG C, time controling, at 16-20 hour, guarantees that water content is lower than 0.5%.

Principle of the present invention: utilize the micropore of lead-acid battery cathode plate to store the dilute sulfuric acid of relative density, a certain amount of sulfuric acid reacts with the lead sponge on negative plate surface area in atmosphere and generates separator, thus reach slow down oxidation order ground, utilize antioxidant to non-complete reaction to carrying out make up and reinforce.

Negative plate prepared by the present invention can be used on the higher high-end electrical appliance of battery request, because whole process does not contact running water metal ion and mineral matter, the performance such as self-discharge of battery, energy storage capacity, discharge time can match in excellence or beauty with conventional batteries.

The invention has the beneficial effects as follows: using water wisely of the present invention, remove from waste water treatment and partial discharge to the pollution of environment, improve production efficiency, improve the combination property of product.

Embodiment

The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, setting forth the present invention further.

Embodiment 1

A kind of lead-acid battery cathode plate Non-water washing technique, comprises following processing step,

1. first the negative plate changed into being immersed in density is in the dilute sulfuric acid of 1.05g/ml 5 minutes, and temperature controls at 20 DEG C, makes the dilute sulfuric acid storing relative density in the micropore of negative plate;

2. by negative plate soaked in step 1 hanging in atmosphere, hanging under the room temperature of 20 DEG C 5 minutes, make the outflow of the sulfuric acid of negative plate inside on effective area and react with the lead sponge on negative plate surface area in atmosphere to generate separator, its reaction equation is:

2Pd+O₂+ 2H₂sO₄→ 2PdSO₄+ 2H₂o; Utilize the micropore of lead-acid battery cathode plate to store the dilute sulfuric acid of relative density, a certain amount of sulfuric acid reacts with the lead sponge on negative plate surface area in atmosphere and generates separator, thus reaches the order ground slowing down oxidation;

3. the negative plate after having reacted in step 2 being immersed in density is at normal temperatures in the antioxidant solution of 1.035g/ml, soak time 5 minutes, utilize the non-complete reaction in antioxidant anticathode plate surface to place carry out making up and reinforcing;

4. put on stainless steel rod by the negative plate after grooving in step 3 and arrange, plate and distance between plates 3-6mm, then proceed to air draft 3 hours, dry at the temperature of 70 DEG C, time controling, at 18 hours, guarantees that water content is lower than 0.5%.

Negative plate prepared by the present invention can be used on the higher high-end electrical appliance of battery request, because whole process does not contact running water metal ion and mineral matter, the performance such as self-discharge of battery, energy storage capacity, discharge time can match in excellence or beauty with conventional batteries.

Embodiment 2

A kind of lead-acid battery cathode plate Non-water washing technique, comprises following processing step,

1. first the negative plate changed into being immersed in density is in the dilute sulfuric acid of 1.05g/ml 6 minutes, and temperature controls at 25 DEG C, makes the dilute sulfuric acid storing relative density in the micropore of negative plate;

2. by negative plate soaked in step 1 hanging in atmosphere, hanging under the room temperature of 25 DEG C 4 minutes, make the outflow of the sulfuric acid of negative plate inside on effective area and react with the lead sponge on negative plate surface area in atmosphere to generate separator, its reaction equation:

2Pd+O₂+ 2H₂sO₄→ 2PdSO₄+ 2H₂o; Utilize the micropore of lead-acid battery cathode plate to store the dilute sulfuric acid of relative density, a certain amount of sulfuric acid reacts with the lead sponge on negative plate surface area in atmosphere and generates separator, thus reaches the order ground slowing down oxidation.

3. the negative plate after having reacted in step 2 being immersed in density is at normal temperatures in the antioxidant solution of 1.035g/ml, soak time 4 minutes; Utilize antioxidant anticathode plate surface non-complete reaction to place carry out making up and reinforcing;

4. put on stainless steel rod by the negative plate after grooving in step 3 and arrange, plate and distance between plates 3-6mm, then proceed to air draft 2 hours, dry at the temperature of 79 DEG C, time controling, at 16 hours, guarantees that water content is lower than 0.5%.

Negative plate prepared by the present invention can be used on the higher high-end electrical appliance of battery request, because whole process does not contact running water metal ion and mineral matter, the performance such as self-discharge of battery, energy storage capacity, discharge time can match in excellence or beauty with conventional batteries.

Table 1 be tradition washing with present invention process process equal number negative plate needed raw material the table of comparisons:

Table 1

Running water

Dilute sulfuric acid

Boric acid

Antioxidant

Sewage disposal

Discharge

Traditional handicraft

8 tons

0

10kg

0

8 tons

1 ton

The present invention

0

2kg

0

1kg

0

0

As can be seen from Table 1, traditional washing process needs a large amount of running water, and also will process the sewage after flushing and discharge, and environmental pollution is very serious.And technique of the present invention does not need with water, do not have the discharge of discarded object, the solution of configuration can recycle, and with energy-saving and emission-reduction, reduces costs as starting point, meets social development needs.

The relevant parameter that table 2 gives negative plate finished product of the present invention illustrates:

Table 2

	Lead oxide (%)	Lead sulfate (%)	Battery acid content (%)
				Tradition manufactures	7.68	2.35	46.5
The present invention	4.32	6.47	47.4

(1) lead oxide is one of physical and chemical index judging negative plate quality, and this technique is lower than conventional method 3.36%, facts have proved feasible.

(2) lead sulfate does not do requirement in negative plate physical and chemical index, and the applicant controls within 15%.

(3) to make sulfuric acid concentration after battery high by 0.9% for negative plate, by reducing 0.01g/ml during acid adding proportion.

More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.

Claims (3)

1. lead-acid battery cathode plate Non-water washing technique, is characterized in that:

A. first the negative plate changed into be immersed in dilution heat of sulfuric acid and to keep 4-6 minute, temperature control

Built in 10-45 DEG C, make the dilute sulfuric acid storing relative density in the micropore of negative plate;

B. by negative plate soaked in step a hanging in atmosphere, make the outflow of the sulfuric acid of negative plate inside on effective area and react with the lead sponge on negative plate surface area in atmosphere to generate separator, thus reach the order ground slowing down oxidation, its reaction equation is:

2Pd+O₂+2H₂SO₄→2PdSO₄+2H₂O；

C. the negative plate after having reacted in step b being immersed in density is at normal temperatures in the antioxidant solution of 1.035g/ml, soak time 4-6 minute, utilize the non-complete reaction in antioxidant anticathode plate surface to place carry out making up and reinforcing;

D. put on stainless steel rod by the negative plate after grooving in step c and arrange, plate and distance between plates 3-6mm, then proceed to exhaust blower 2-4 hour, dry at the temperature of 60-79 DEG C, time controling, at 16-20 hour, guarantees that water content is lower than 0.5%.

2. lead-acid battery cathode plate Non-water washing technique according to claim 1, is characterized in that: in described step a, the density of dilution heat of sulfuric acid is 1.05g/ml.

3. lead-acid battery cathode plate Non-water washing technique according to claim 1, it is characterized in that: in described step b, the temperature of hanging is at 10-45 DEG C, the time is 4-6 minute.